linux-kernel - Re: [PATCH 03/34] net/ceph: convert put_page() to put_user

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Message-ID: <2f0d5993e9731808b73b0018f5fc4b3335fc6373.camel@kernel.org>
Date:   Fri, 02 Aug 2019 18:32:33 -0400
From:   Jeff Layton <jlayton@...nel.org>
To:     john.hubbard@...il.com, Andrew Morton <akpm@...ux-foundation.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ira Weiny <ira.weiny@...el.com>, Jan Kara <jack@...e.cz>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Jérôme Glisse <jglisse@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        amd-gfx@...ts.freedesktop.org, ceph-devel@...r.kernel.org,
        devel@...verdev.osuosl.org, devel@...ts.orangefs.org,
        dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        kvm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-block@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-fbdev@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-media@...r.kernel.org, linux-mm@...ck.org,
        linux-nfs@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org, linux-xfs@...r.kernel.org,
        netdev@...r.kernel.org, rds-devel@....oracle.com,
        sparclinux@...r.kernel.org, x86@...nel.org,
        xen-devel@...ts.xenproject.org, John Hubbard <jhubbard@...dia.com>,
        Ilya Dryomov <idryomov@...il.com>, Sage Weil <sage@...hat.com>,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH 03/34] net/ceph: convert put_page() to put_user_page*()

On Thu, 2019-08-01 at 19:19 -0700, john.hubbard@...il.com wrote:
> From: John Hubbard <jhubbard@...dia.com>
> 
> For pages that were retained via get_user_pages*(), release those pages
> via the new put_user_page*() routines, instead of via put_page() or
> release_pages().
> 
> This is part a tree-wide conversion, as described in commit fc1d8e7cca2d
> ("mm: introduce put_user_page*(), placeholder versions").
> 
> Cc: Ilya Dryomov <idryomov@...il.com>
> Cc: Sage Weil <sage@...hat.com>
> Cc: David S. Miller <davem@...emloft.net>
> Cc: ceph-devel@...r.kernel.org
> Cc: netdev@...r.kernel.org
> Signed-off-by: John Hubbard <jhubbard@...dia.com>
> ---
>  net/ceph/pagevec.c | 8 +-------
>  1 file changed, 1 insertion(+), 7 deletions(-)
> 
> diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c
> index 64305e7056a1..c88fff2ab9bd 100644
> --- a/net/ceph/pagevec.c
> +++ b/net/ceph/pagevec.c
> @@ -12,13 +12,7 @@
>  
>  void ceph_put_page_vector(struct page **pages, int num_pages, bool dirty)
>  {
> -	int i;
> -
> -	for (i = 0; i < num_pages; i++) {
> -		if (dirty)
> -			set_page_dirty_lock(pages[i]);
> -		put_page(pages[i]);
> -	}
> +	put_user_pages_dirty_lock(pages, num_pages, dirty);
>  	kvfree(pages);
>  }
>  EXPORT_SYMBOL(ceph_put_page_vector);

This patch looks sane enough. Assuming that the earlier patches are OK:

Acked-by: Jeff Layton <jlayton@...nel.org>